[MacPorts] #29154: support building dragonegg in gcc45

[MacPorts]

#29154: support building dragonegg in gcc45
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 Reporter:  howarth@…                 |       Owner:  mww@…           
     Type:  enhancement               |      Status:  new             
 Priority:  Normal                    |   Milestone:                  
Component:  ports                     |     Version:  1.9.2           
 Keywords:  lang                      |        Port:  gcc45           
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Comment(by ryandesign@…):

 Your patch also includes a `platform darwin 11` section. Is this related
 to this problem?

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Ticket URL: <https://trac.macports.org/ticket/29154#comment:2>
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